CN103051179A - High step-up ratio voltage doubling structure passive lossless clamped converter - Google Patents

High step-up ratio voltage doubling structure passive lossless clamped converter Download PDF

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Publication number
CN103051179A
CN103051179A CN2012105763306A CN201210576330A CN103051179A CN 103051179 A CN103051179 A CN 103051179A CN 2012105763306 A CN2012105763306 A CN 2012105763306A CN 201210576330 A CN201210576330 A CN 201210576330A CN 103051179 A CN103051179 A CN 103051179A
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China
Prior art keywords
diode
voltage
clamping
clamped
converter
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CN2012105763306A
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Chinese (zh)
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杨波
赵一
智秀杰
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HANGZHOU KEWEIDA ELECTRIC CO Ltd
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HANGZHOU KEWEIDA ELECTRIC CO Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The invention discloses a high step-up ratio voltage doubling structure passive lossless clamped converter, which comprises a power switch tube, a clamped diode, a freewheel diode, an output diode, a clamped capacitor, a voltage doubling capacitor, an output capacitor and a coupled inductor with two windings. The voltage gain of the converter is expanded and the voltage stress of the switch tube and the diodes is reduced through the coupled inductor, zero current switch-on of the switch tube is realized and reverse recovery current of the diodes is inhibited through leakage inductance of the coupled inductor, a clamped circuit consisting of the clamped diode and the clamped capacitor effectively absorbs voltage peak when the power switch tube is switched off and realizes the lossless transfer of energy, the gain of the converter is further improved and the voltage stress of the power switch tube and the output diode are further reduced through a voltage doubling circuit, the high step-up ratio voltage doubling structure passive lossless clamped converter has the advantages of simple circuit structure and convenience for control and is applied to small-power, high-gain and high-efficiency photovoltaic grid-connected power generation conversion places.

Description

High step-up ratio multiplication of voltage structure passive and nondestructive clamping converter
Technical field
The present invention relates to a kind of DC-to-DC converter and application, is high step-up ratio multiplication of voltage structure passive and nondestructive clamping converter specifically.
Background technology
In solar power system, because the output voltage of monolithic solar cell is lower, and the required voltage of inversion grid connection generating is higher, therefore needs the one-level DC-to-DC converter low voltage and direct current to be converted to the high-voltage direct-current electricity that is fit to be incorporated into the power networks.In the distributed solar energy electricity generating plan, the power capacity of monolithic solar cell is less, but having relatively high expectations to efficient.Therefore how to realize high-gain, high efficiency and single-phase single-grade converter simple in structure, significant for the development that promotes photovoltaic industry.
The voltage gain of conventional single-phase single-tube booster type (Boost) DC-DC converter only has duty ratio to determine that voltage gain is limited, is difficult to satisfy the conversion requirement of high-gain.The voltage stress of power switch pipe is larger, is difficult to adopt the high performance switching tube of low pressure to reduce conduction loss.And converter is operated in the hard switching state, and switching loss is larger.In order to realize the soft switch motion of Boost converter, in recent years, some have in succession been studied by being attached with the soft switch solution of source power switch or passive device, although these circuit have been realized soft switch motion, but can not reduce the voltage stress of switching tube, can not realize the high-gain conversion of system.For the voltage gain of Lifting Transform device, a kind of scheme is to adopt the scheme of switching capacity, but the required switching tube quantity of this scheme is more, has increased system cost; Other scheme is to adopt three complicated winding coupled inductance schemes, and the shortcoming of this scheme is the coupling inductance complex structure, is unfavorable for industrial processes, is difficult to guarantee the consistency of circuit.
Summary of the invention
It is little that the present invention overcomes conventional single-phase single-tube booster type DC-DC converter voltage gain, conducting power consumption and switch power consumption large shortcoming, provide a kind of simple in structure, control the high step-up ratio multiplication of voltage structure passive and nondestructive clamping converter of convenient and noenergy loss.
High step-up ratio multiplication of voltage structure passive and nondestructive clamping converter of the present invention, the first end of coupling inductance the first winding links to each other with the positive pole of power supply, the second end of the first winding links to each other with the drain electrode of power switch pipe and the anode of clamping diode, the negative electrode of clamping diode links to each other with the anode of the first end of clamping capacitance and fly-wheel diode, and the second end of the source electrode of power switch pipe and the negative pole of power supply and clamping capacitance links to each other;
One end of coupling inductance the second winding links to each other with the negative pole of power supply, coupling inductance the second winding the second end links to each other with the first end of multiplication of voltage electric capacity, the second end of multiplication of voltage electric capacity links to each other with the negative electrode of fly-wheel diode, coupling inductance the second winding and coupling inductance the first winding are all two windings in the coupling inductance, the Same Name of Ends take the first end of the first end of the first winding and the second winding as coupling inductance;
The anode of output diode links to each other with the negative electrode of fly-wheel diode, and the negative electrode of output diode links to each other with the first end of output capacitance, and the second end of output capacitance links to each other with the first end of clamping capacitance.
Described converter, the one or more synchronous rectifiers that make in its clamping diode, fly-wheel diode and the output diode all can work.
During converter work of the present invention, utilize the transformer action of coupling inductance to expand the converter voltage gain, reduced the voltage stress of power switch pipe and clamping diode, reduced the conduction loss of power device.The introducing of voltage-multiplying circuit unit has further improved the voltage gain of circuit and has reduced the voltage stress of device; Utilize the leakage inductance of coupling inductance to realize the zero current turning-on of power switch pipe; Utilize simultaneously the leakage inductance of coupling inductance also to realize the soft shutoff of fly-wheel diode and output diode; Utilize the energy of clamping diode and clamping capacitance absorption leakage inductance, no-voltage spike when power switch pipe is turn-offed, and the leakage inductance energy that absorbs finally is delivered to load, the realization Lossless Snubber; Its circuit structure is simple, and control is convenient, is applicable to small-power, high-gain and the high efficiency distributed photovoltaic occasion of generating electricity by way of merging two or more grid systems.
Advantage of the present invention is: need not extra power switch and inductance element, attachment element is few, simple in structure, control is convenient, noenergy losser in the circuit can improve the efficient of circuit, and in the commutation course, no-voltage overshoot when power switch pipe turn-offs, no current overshoot when fly-wheel diode is opened; Coupling inductance transferring energy all when the switching tube of correspondence turns on and off has improved the utilance of coupling inductance, has reduced the volume of coupling inductance.
Description of drawings
Fig. 1 is circuit diagram of the present invention;
Embodiment
Referring to Fig. 1, high step-up ratio multiplication of voltage structure passive and nondestructive clamping converter of the present invention, wherein:
Coupling inductance the first winding L 1First end link to each other the first winding L with the positive pole of power supply Vin 1The second end link to each other with the drain electrode of power switch tube S and the anode of clamping diode Dc, the negative electrode of clamping diode Dc links to each other with the first end of clamping capacitance Cc and the anode of sustained diode r, and the negative pole of the source electrode of power switch tube S and power supply Vin and the second end of clamping capacitance Cc link to each other;
Coupling inductance the second winding L 2An end link to each other coupling inductance the second winding L with the negative pole of power supply Vin 2The second end links to each other with the first end of multiplication of voltage capacitor C m, and the second end of multiplication of voltage capacitor C m links to each other with the negative electrode of sustained diode r, coupling inductance the second winding L 2With coupling inductance the first winding L 1Be all two windings in the coupling inductance, among the figure by " * " mark the first winding L 1With the second winding L 2Same Name of Ends;
The anode of output diode Do links to each other with the negative electrode of sustained diode r, and the negative electrode of output diode Do links to each other with the first end of output capacitance Co, and the second end of output capacitance Co links to each other with the first end of clamping capacitance Cc.
The voltage of output capacitance Co is Vout, and energy finally passes to load Ro.
High step-up ratio multiplication of voltage structure passive and nondestructive clamping converter has five kinds of courses of work in a switch periods, i.e. the change of current between power switch tube S shutoff and clamping diode Dc open; The change of current between sustained diode r shutoff and the output diode Do conducting; Clamping diode Dc turn off process; Commutation course between output diode Do shutoff and power switch tube S are opened, sustained diode r turn on process.
The change of current between power switch tube S shutoff and clamping diode Dc open:
Before the change of current, circuit is in power switch tube S and sustained diode r conducting, the steady-working state that clamping diode Dc and output diode Do turn-off.When power switch tube S is turn-offed, voltage rises rapidly on the power switch tube S, the voltage at clamping diode Dc two ends is dropped rapidly to zero, clamping diode Dc is open-minded, because the effect of clamping capacitance Cc, the voltage at power switch tube S two ends is certain voltage value by clamp, has realized that the soft clamping of power switch tube S turn-offs.
The change of current between sustained diode r shutoff and the output diode Do conducting:
After clamping diode Dc opens, voltage on the clamping capacitance Cc rises so that certain slope is linear from certain value, the leakage inductance energy of coupling inductance is transferred on the clamping capacitance Cc, and the electric current of sustained diode r drops to zero with certain slope linearity, and sustained diode r turn-offs.And the voltage linear at output diode Do two ends drops to zero, and output diode Do is open-minded, and energy begins to transfer to output.Circuit enters into power switch tube S and sustained diode r turn-offs, the steady-working state of clamping diode Dc and output diode Do conducting.
Clamping diode Dc turn off process:
After the output diode Do conducting, electric current on the clamping diode Dc descends so that certain slope is linear, when the electric current on the clamping diode Dc dropped to zero, clamping diode Dc turn-offed naturally, and energy is transferred to load Ro by coupling inductance the second winding from multiplication of voltage capacitor C m.Circuit enters the first switching tube S, and clamping diode Dc and sustained diode r turn-off, the steady-working state of output diode Do conducting.
Commutation course between output diode Do shutoff and power switch tube S are opened:
The gate signal of power switch tube S provides, the electric current of power switch tube S rises from zero so that certain slope is linear, realized the zero current turning-on of power switch tube S, the electric current of output diode Do descends so that certain slope is linear, when the electric current of output diode Do drops to zero, output diode Do turn-offs, and has realized that output diode Do turn-offs and the change of current of power switch tube S between opening, and has reduced the reverse recovery loss of output diode Do.
Sustained diode r turn on process:
Power switch tube S is opened with output diode Do pass and is had no progeny, and coupling inductance is operated in the normal shock transformer state, and the voltage linear at sustained diode r two ends drops to zero, and sustained diode r is open-minded, and energy begins to transfer to multiplication of voltage capacitor C m.Circuit ingoing power switching tube S and sustained diode r conducting, the steady-working state that clamping diode Dc and output diode Do turn-off.

Claims (2)

1. one kind high step-up ratio multiplication of voltage structure passive and nondestructive clamping converter is characterized in that:
Coupling inductance the first winding (L 1) first end link to each other the first winding (L with the positive pole of power supply (Vin) 1) the second end link to each other with the drain electrode of power switch pipe (S) and the anode of clamping diode (Dc), the negative electrode of clamping diode (Dc) links to each other with the first end of clamping capacitance (Cc) and the anode of fly-wheel diode (Dr), and the negative pole of the source electrode of power switch pipe (S) and power supply (Vin) and the second end of clamping capacitance (Cc) link to each other;
Coupling inductance the second winding (L 2) an end link to each other coupling inductance the second winding (L with the negative pole of power supply (Vin) 2) the second end links to each other with the first end of multiplication of voltage electric capacity (Cm), the second end of multiplication of voltage electric capacity (Cm) links to each other with the negative electrode of fly-wheel diode (Dr), coupling inductance the second winding (L 2) and coupling inductance the first winding (L 1) be all two windings in the coupling inductance, with the first winding (L 1) first end and the second winding (L 2) first end be the Same Name of Ends of coupling inductance;
The anode of output diode (Do) links to each other with the negative electrode of fly-wheel diode (Dr), and the negative electrode of output diode (Do) links to each other with the first end of output capacitance (Co), and the second end of output capacitance (Co) links to each other with the first end of clamping capacitance (Cc).
2. high step-up ratio multiplication of voltage structure passive and nondestructive clamping converter as claimed in claim 1, it is characterized in that, one or more synchronous rectifiers that make in clamping diode (Dc), fly-wheel diode (Dr) and the output diode (Do) all can work.
CN2012105763306A 2012-12-26 2012-12-26 High step-up ratio voltage doubling structure passive lossless clamped converter Pending CN103051179A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103427660A (en) * 2013-08-26 2013-12-04 华南理工大学 Double-winding coupling inductance voltage-multiplying type single-switching-tube high-gain converter
CN103633835A (en) * 2013-11-14 2014-03-12 华南理工大学 DC-DC (Direct Current to Direct Current) converter with high efficiency, high gain and low voltage and current stresses
CN103746556A (en) * 2013-12-30 2014-04-23 杭州科为达电气有限公司 High step-up ratio converter for DC (Direct Current) module on basis of coupled inductors
CN106026643A (en) * 2016-07-15 2016-10-12 安徽工业大学 High-voltage-gain DC-DC converter integrating switching capacitor and coupling inductor
CN106877657A (en) * 2017-03-22 2017-06-20 天津大学 The fuel cell imported quasi- Z source switches capacitance boost DC converter of wide scope
WO2018058607A1 (en) * 2016-09-30 2018-04-05 Astec International Limited Snubber circuits for power converters

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US20070216319A1 (en) * 2006-03-17 2007-09-20 Yuan Ze University High efficiency single stage bidirectional converter
CN101783588A (en) * 2009-12-31 2010-07-21 杭州浙大太阳电气有限公司 Passive and nondestructive clamping single-phase high-gain converter
CN101867297A (en) * 2010-07-02 2010-10-20 杭州浙大太阳电气有限公司 Single-phase soft-switching and high-gain boost converter for distributed photovoltaic power generation
CN102364852A (en) * 2011-10-24 2012-02-29 杭州浙阳电气有限公司 Single switching tube high-grain converter based on coupling inductance voltage-multiplying unit
CN102832809A (en) * 2012-08-07 2012-12-19 燕山大学 Inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter
CN203056966U (en) * 2012-12-26 2013-07-10 杭州科为达电气有限公司 High boost ratio voltage doubling structure passive lossless clamp converter

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060226816A1 (en) * 2005-04-11 2006-10-12 Yuan Ze University Boost converter utilizing bi-directional magnetic energy transfer of coupling inductor
US20070216319A1 (en) * 2006-03-17 2007-09-20 Yuan Ze University High efficiency single stage bidirectional converter
CN101783588A (en) * 2009-12-31 2010-07-21 杭州浙大太阳电气有限公司 Passive and nondestructive clamping single-phase high-gain converter
CN101867297A (en) * 2010-07-02 2010-10-20 杭州浙大太阳电气有限公司 Single-phase soft-switching and high-gain boost converter for distributed photovoltaic power generation
CN102364852A (en) * 2011-10-24 2012-02-29 杭州浙阳电气有限公司 Single switching tube high-grain converter based on coupling inductance voltage-multiplying unit
CN102832809A (en) * 2012-08-07 2012-12-19 燕山大学 Inductance regulating switch capacitor-type passive clamping soft switching high-gain boost-type converter
CN203056966U (en) * 2012-12-26 2013-07-10 杭州科为达电气有限公司 High boost ratio voltage doubling structure passive lossless clamp converter

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103427660A (en) * 2013-08-26 2013-12-04 华南理工大学 Double-winding coupling inductance voltage-multiplying type single-switching-tube high-gain converter
CN103633835A (en) * 2013-11-14 2014-03-12 华南理工大学 DC-DC (Direct Current to Direct Current) converter with high efficiency, high gain and low voltage and current stresses
CN103633835B (en) * 2013-11-14 2016-04-13 华南理工大学 The DC-DC converter of High-efficiency high-gain low-voltage current stress
CN103746556A (en) * 2013-12-30 2014-04-23 杭州科为达电气有限公司 High step-up ratio converter for DC (Direct Current) module on basis of coupled inductors
CN106026643A (en) * 2016-07-15 2016-10-12 安徽工业大学 High-voltage-gain DC-DC converter integrating switching capacitor and coupling inductor
CN106026643B (en) * 2016-07-15 2019-03-29 安徽工业大学 A kind of high voltage gain DC-DC converter of hybrid switch capacitor and coupling inductance
WO2018058607A1 (en) * 2016-09-30 2018-04-05 Astec International Limited Snubber circuits for power converters
US10236764B2 (en) 2016-09-30 2019-03-19 Astec International Limited Snubber circuits for power converters
CN106877657A (en) * 2017-03-22 2017-06-20 天津大学 The fuel cell imported quasi- Z source switches capacitance boost DC converter of wide scope

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Address after: Hangzhou City, Zhejiang province 310005 Gongshu District Kang Road No. 18 building 11 floor

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Application publication date: 20130417